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Consolidated Statements of Changes In Shareholders' Equity (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Consolidated Statements Of Changes In Shareholders' Equity [Abstract]
Dividend per share	$ 1.00us-gaap_CommonStockDividendsPerShareCashPaid	$ 0.55us-gaap_CommonStockDividendsPerShareCashPaid
Shares held by the subsidiary	14,971us-gaap_TreasuryStockShares	14,971us-gaap_TreasuryStockShares
Statement [Line Items]
Exercise of options	$ 1,353us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised	$ 1,893us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised
Maximum [Member]
Statement [Line Items]
Exercise of options	$ 1us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised / us-gaap_RangeAxis = us-gaap_MaximumMember

X

- Definition

Aggregate dividends paid during the period for each share of common stock outstanding.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef



-Publisher SEC



-Name Regulation S-X (SX)



-Number 210



-Section 04



-Article 3







Reference 2: http://www.xbrl.org/2003/role/presentationRef



-Publisher FASB



-Name Accounting Standards Codification



-Topic 505



-SubTopic 10



-Section S99



-Paragraph 1



-Subparagraph (SX 210.3-04)



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X

- Definition

Value of stock issued as a result of the exercise of stock options.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef



-Publisher SEC



-Name Regulation S-X (SX)



-Number 210



-Section 04



-Article 3







Reference 2: http://www.xbrl.org/2003/role/presentationRef



-Publisher FASB



-Name Accounting Standards Codification



-Topic 505



-SubTopic 10



-Section 50



-Paragraph 2



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-Section S99



-Paragraph 1



-Subparagraph (SX 210.3-04)



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Reference 4: http://www.xbrl.org/2003/role/presentationRef



-Publisher FASB



-Name Accounting Standards Codification



-Topic 210



-SubTopic 10



-Section S99



-Paragraph 1



-Subparagraph (SX 210.5-02.29-31)



-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682







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- Definition

Number of common and preferred shares that were previously issued and that were repurchased by the issuing entity and held in treasury on the financial statement date. This stock has no voting rights and receives no dividends.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef



-Publisher FASB



-Name Accounting Standards Codification



-Topic 210



-SubTopic 10



-Section S99



-Paragraph 1



-Subparagraph (SX 210.5-02.28,29)



-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682







Reference 2: http://www.xbrl.org/2003/role/presentationRef



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